Dwight, Navtec sells a fluid in about a 32 ounce bottle. I only found one rigger in Annapolis who carried it. Becasue my whole system needed to be flushed and rebuilt I did not tackle it, but it seems like you should be able to DIY. On the system that I have there is a reservoir, pump and piston. The fluid was sticking to the inside of the reservoir, so that had to be replaced too. I don't know if there is a recommended service interval, but if the fluid is cloudy I would seriously consider changing it. If you have a newer system that is all one unit it should be much easier. Joel 35/3 Annapolis
On Tue, Nov 27, 2012 at 8:47 AM, dwight veinot <dwightvei...@hfx.eastlink.ca > wrote: > ** ** ** ** > > Is it recommended to periodically replace the hydraulic fluid in the > Navtec backstay adjusters? **** > > ** ** > > If so is it a DIY project and what is the recommended replacement fluid? * > *** > > ** ** > > Dwight Veinot**** > > C&C 35 MKII, Alianna**** > > Head of St. Margaret's Bay, NS**** > ------------------------------ > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Joel > Aronson > *Sent:* November 26, 2012 11:03 PM > > *To:* **cnc-list@cnc-list.com** > *Subject:* Re: Stus-List Backstay tension > **** > > ** ** > > I have the same original unit as Jake. The fluid apparently had never > been changed. It was like molasses instead of looking like vegetable oil. > It would have been cheaper to replace it, but I didn't know that going in, > so I had it all flushed and rebuilt.**** > > ** ** > > If your hydraulic backstay has never been serviced, it may need attention. > > Joel**** > > 35/3**** > > ****Annapolis******** > > Sent from my iPad**** > > > On Nov 26, 2012, at 7:46 PM, dwight veinot <dwightvei...@hfx.eastlink.ca> > wrote:**** > > Jake **** > > **** > > My Navtec adjuster is probably an older unit than what you have. It came > to me with the boat so I am guessing it is probably around 15 or more years > old. It is an integral unit and the gage and knob for the relief valve are > attached on opposite sides near the base of the square looking cylinder. I > think it reads in psi and its readings correlate quite well at around > 800-1200 psi when I check backstay tension with my Loos gage but my > inexpensive Loos gage max’s out at around 1200 on 9/32 wire so it is not > useful for tension comparisons above that. I have tensioned the backstay > incrementally to 3000 lbs according to its gage but as I said earlier > tensions above 1200 psi has no noticeable effect on pointing ability or > boat speed but a slight effect on weather helm and head stay sag. I spend > my cruising time fiddling around with a lot of adjustments and measurements > but I am happy to admit that I am still learning and very interested in > what others have to contribute. **** > > **** > > I guess I have been lucky that the hydraulic seals have lasted as long as > they have without problems.**** > > **** > > Dwight Veinot**** > > C&C 35 MKII, Alianna**** > > Head of St. Margaret's Bay, NS**** > ------------------------------ > > *From:* CnC-List > [mailto:cnc-list-boun...@cnc-list.com<cnc-list-boun...@cnc-list.com>] > *On Behalf Of *Jake Brodersen > *Sent:* November 26, 2012 7:55 PM > *To:* cnc-list@cnc-list.com > *Subject:* Re: Stus-List Backstay tension**** > > **** > > Dwight,**** > > **** > > If you Navtec gauge is like mine (in a panel), it probably reads direct > pressure, not the pressure exerted on the backstay. They would be the same > if the piston area was 1 sq. inch, but otherwise the pressure times the > piston area will give you the tension on the backstay.**** > > **** > > Jake**** > > **** > > *Jake Brodersen***** > > *C&C 35 Mk-III***** > > *"Midnight Mistress***** > > *****Hampton**** VA******* > > **** > > **** > > **** > > > > **** > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > -- Joel 301 541 8551
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